SIST-TS CLC/TS 50607:2013

Satellite signal distribution over a single coaxial cable - Second generation

This Technical Specification describes: - the system physical structure; - the system control signals, which implement a set of messages using DiSEqC physical layer but not the DiSEqC message structure; - the definition of identified configurations; - the management of the potential collisions in the control signals traffic. Figure 1 illustrates the physical system configuration considered in this Technical Specification. Several satellite signal demodulators can receive signals from any of the input signal banks (Bank 1, Bank 2, •••• Bank M, with M ≤ 256) of the LNB or the switch. The signals selected by the demodulators (or receivers) are transported via a single cable to these demodulators (Receiver 1, Receiver 2, •••• Receiver N, with N ≤ 32). To achieve these single cable distributions, the Single Cable Interface (SCIF, likely embedded in a LNB or a Switch) features some specific functions and characteristics.

Verteilen von Satellitensignalen über ein Koaxialkabel - Zweite Generation

Distribution de signaux satellitaires sur un unique câble coaxial - Installations de seconde génération

Distribucija satelitskih signalov po enojnem koaksialnem kablu - Druga generacija inštalacij

Ta tehnična specifikacija opisuje: – fizično sestavo sistema; – kontrolne signale sistema, ki uvedejo nabor sporočil s fizično plastjo DiSEqC, vendar ne s sestavo sporočil DiSEqC; – definicijo prepoznanih konfiguracij; – upravljanje potencialnih kolizij kontrolnih signalov. Slika 1 prikazuje konfiguracijo fizičnega sistema, ki jo obravnava ta tehnična specifikacija. Več demodulatorjev satelitskega signala lahko sprejema signale iz katerega koli vhodnega niza signalov (Niz 1, Niz 2, •••• Niz M, pri čemer je M ≤ 256) LNB ali stikala. Signali, ki jih izberejo demodulatorji (ali sprejemniki), se prenesejo prek enega kabla v te demodulatorje (Sprejemnik 1, Sprejemnik 2, •••• Sprejemnik N, pri čemer je N ≤ 32). Za doseganje teh porazdelitev enega kabla vmesnik SCIF (Single Cable Interface, ki je verjetno vdelan v LNB ali stikalo) vključuje nekatere posebne funkcije in karakteristike.

General Information

• Status: Withdrawn
• Publication Date: 16-Oct-2013
• Withdrawal Date: 06-Apr-2015
• ICS: 33.060.40 - Cabled distribution systems
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 03-Apr-2015
• Due Date: 26-Apr-2015
• Completion Date: 07-Apr-2015
• Ref Project: CLC/TS 50607:2013 - Satellite signal distribution over a single coaxial cable - Second generation

Relations

• Replaced By: SIST EN 50607:2015 - Satellite signal distribution over a single coaxial cable - Second generation
• Effective Date: 20-Jan-2015
• Replaced By: SIST EN 50607:2015 - Satellite signal distribution over a single coaxial cable - Second generation
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CLC/TS 50607:2013
01-november-2013
Distribucija satelitskih signalov po enojnem koaksialnem kablu - Druga generacija
inštalacij
Satellite signal distribution over a single coaxial cable - Second generation
Verteilen von Satellitensignalen über ein Koaxialkabel - Zweite Generation
Distribution de signaux satellitaires sur un unique câble coaxial - Installations de seconde
génération
Ta slovenski standard je istoveten z: CLC/TS 50607:2013
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
SIST-TS CLC/TS 50607:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CLC/TS 50607:2013

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SIST-TS CLC/TS 50607:2013

TECHNICAL SPECIFICATION
CLC/TS 50607

SPÉCIFICATION TECHNIQUE
September 2013
TECHNISCHE SPEZIFIKATION

ICS 33.060.40


English version


Satellite signal distribution over a single coaxial cable ‒ Second
generation



Distribution de signaux satellitaires sur un Verteilen von Satellitensignalen über ein
unique câble coaxial - Koaxialkabel ‒ Zweite Generation
Installations de seconde génération







This Technical Specification was approved by CENELEC on 2013-09-04.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.



CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 50607:2013 E

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Contents Page
Foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 7
4 System architecture . 8
5 SCIF control signals. 10
5.1 DC levels . 10
5.2 Method of the data bit signalling . 12
6 Structure and format of the SCD2 messages . 13
6.1 Backwards Compatibility to EN 50494 . 13
6.2 Non-DiSEqC structure . 13
6.3 Uni-directional operation . 13
6.4 Bi-directional operation . 13
7 SCD2 commands . 13
7.1 ODU_Channel_change . 13
7.2 ODU_Channel_change_PIN . 15
7.3 ODU_UB_avail . 15
7.4 ODU_UB_PIN . 16
7.5 ODU_UB_inuse . 17
7.6 ODU_UB_freq . 18
7.7 ODU_UB_switches . 19
8 Conventions . 19
8.1 UB slots numbering . 19
8.2 Numbering of satellite IF banks . 20
9 Traffic collision management rules . 20
9.1 General . 20
9.2 Automatic detection of SCIF control signal failure . 21
9.3 Pseudo-random repeat . 21
Annex A (normative) Implementation rules . 23
A.1 User interface . 23
A.2 Installation impedance . 23
A.3 Signal reflection and return loss in installations . 24
A.4 Power supply of the SCIF . 24
A.5 Remarks concerning power supply . 25

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Figures Page
Figure 1 — General architecture of the single cable distribution. 6
Figure 2 — General system operation and UB slot frequency mapping . 8
Figure 3 — Installation example, system with reception of one orbital position (4 Satellite IF banks) by two
receivers (2 UB slots) . 9
Figure 4 — Installation example implementing the reception of two orbital positions (8 satellite IF banks) by
four receivers (4 UB slots) . 9
Figure 5 — Installation example implementing the reception of four orbital positions (16 satellite IF banks)
for 12 receivers (12 UB slots) . 10
Figure 6 — Signal sent by the receiver for uni-directional communication . 11
Figure 7 — Signal sent by the receiver for bi-directional communication . 12
Figure 8 — Bit signalling according to DiSEqC format . 13
Figure 9 — SCIF control signal collision between two receivers and recovery mechanism . 22
Figure A.1 — Solution for masking the impedance of the installation during the SCIF control signals . 23
Figure A.2 — Implementation of an external power supply . 24

Tables Page
Table 1 -Timing for unidirectional communication . 11
Table 2 -Timing for bidirectional communication . 12
Table 3 ‒ UB slot numbering . 20

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Foreword
This document (CLC/TS 50607:2013) has been prepared by CLC/TC 209 "Cable networks for television
signals, sound signals and interactive services".
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.

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Introduction
In EN 61319-1:1996/A11:1999, the interfaces for the control and command of the devices
associated with the satellite receivers are described in the following clauses:
 Clause 4: Interfaces requirements for polarizer and polar switchers;
 Clause 5: Interfaces requirements for low-noise block converters (LNB).
In these clauses, analogue techniques are described for controlling the LNB and polar switchers.
TM
In the DiSEqC Bus Functional Specification, the “Digital Satellite Equipment Control Bus” (called
DiSEqC) is introduced as a single method of communication between the satellite and the
peripheral equipment, using only the existing coaxial cables. The existing EN 50494 “Satellite signal
distribution over a single coaxial cable in single dwelling installations” describes a system for
distributing signals via single coaxial cable issued from different bands and polarisations to several
satellite receivers This specification is limited to 8 units per output of the Single Cable Interface and
to 8 Satellite IF banks (bands, feeds, polarisations).
The second generation described in this Technical Specification is intended for single and multiple
dwelling installations and includes the following enhancements compared to EN 50494:
 The number of demodulators is extended to a maximum of 32 units per output of the Single
Cable Interface (hereafter referred to as SCIF) device.
 The system is scaled for a maximum number of 256 Satellite IF banks (bands, feeds,
polarisations)
 The SCIF replies, which may be used during installation process, are also based on DiSEqC.
 Equipment according to this Technical Specification is downwards compatible to the
specifications provided by EN 50494.

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1 Scope
This Technical Specification describes:
 the system physical structure;
 the system control signals, which implement a set of messages using DiSEqC physical layer but
not the DiSEqC message structure;
 the definition of identified configurations;
 the management of the potential collisions in the control signals traffic.
Figure 1 illustrates the physical system configuration considered in this Technical Specification.
Several satellite signal demodulators can receive signals from any of the input signal banks
(Bank 1, Bank 2, ⋅⋅⋅⋅ Bank M, with M ≤ 256) of the LNB or the switch. The signals selected by the
demodulators (or receivers) are transported via a single cable to these demodulators (Receiver 1,
Receiver 2, ⋅⋅⋅⋅ Receiver N, with N ≤ 32).
To achieve these single cable distributions, the Single Cable Interface (SCIF, likely embedded in a
LNB or a Switch) features some specific functions and characteristics.
SINGLE CABLE
SINGLE CABLE
RReceieceivveerr 1 1
IINTNTEERFRFAACECE: : SSCICIFF
Bank 1
Bank 1
Receiver 2
Receiver 2
LLNB NB
PPoowwerer
or
or
Bank 2
Bank 2
spsplliitttterer
SSWWIITTCCHH
BBanank Mk M
Receiver N
Receiver N
SSiinngglle cabe cablle e
ccoonnnneeccttiioonn
AA rreceieceivverer mmaayy i innttegegrratate see sevveerralal d dememoodduullatatoorrs s

Figure 1 — General architecture of the single cable distribution
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 50494 Satellite signal distribution over single coaxial cable in single
dwelling installations
EN 60728-4 Cable networks for television signals, sound signals and interactive
services – Part 4: Passive wideband equipment for coaxial cable
networks
EN 61319-1:1996 + Interconnections of satellite receiving equipment – Part 1: Europe
A11:1999 (IEC 61319-1:1995)
ISO/IEC 13818-1 Information technology – Generic coding of moving pictures and
associated audio information – Part 1
TM
DiSEqC Bus Functional Version 4.2, February 25, 1998
Specification http://www.eutelsat.com/satellites/4_5_5.html

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3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
3.1.1
bank
group of contiguous channels belonging to a polarisation and/or a band
3.1.2
channel
radio frequency transponder signal
3.1.3
demodulator
electronic device integrating at least a tuner and a demodulator
3.1.4
receiver
electronic equipment embedded in a cabinet and integrating all functions for demodulating and decoding the
received satellite signals (a receiver may integrate several demodulators)
3.1.5
universal LNB
LNB with the following characteristics: operation in the Ku bands (10,7 GHz  12,75 GHz); local oscillator
frequency is 9,75 GHz for signal frequencies lower than 11,7 GHz and local oscillator frequency is 10,6 GHz
otherwise
3.2 Abbreviations
CW Continuous Wave
DC Direct Current
DiSEqC Digital Satellite Equipment Control
IF Intermediate Frequency
LNB Low Noise Blockconverter
MDU Multiple Dwelling Unit
MSB Most Significant Bit
ODU Out-Door Unit
PCR Program Clock Reference
PIN Personal Identification Number
PWK Pulse Width Keying
SCD2 Single Cable Distribution 2 (second generation)
SCIF Single Cable Interface
STB Set-Top Box
UB User Band

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4 System architecture
In the single coaxial cable distribution system, the bandwidth of the shared coaxial cable is divided
into slots (user band: UB). The number of slots Nb_ub varies from one application to another; the
number of slots Nb_ub is a characteristic of the SCIF.
The system defined in this Technical Specification limits the number of UB slots to 32 per output of
the SCIF.
Each receiver connected to the single coaxial cable distribution is allocated to one UB slot. This
allocation is done either in static or other modes.
In the static mode, the allocation of the UB slot is done during the installation of the satellite
receiver. Only the static mode is considered in this document.
NOTE Other modes are not described in this document but could be considered in a further release or annex of this
document.
After the slot allocation, the tuner of the receiver operates at a single frequency (centre of the slot
UB). To select a desired channel (frequency Fd), the demodulator sends a SCIF control signal that
provides the following information:
 select the bank (band, feed, polarisation) that carries the desired signal;
 select the frequency (Fd) of the desired signal;
 designate the UB slot on which the desired signal is expected.
Figure 2 illustrates the frequency mapping for such a single coaxial cable system.
Figure 3, Figure 4 and Figure 5 illustrate various examples for implementing the single cable
distribution system (other application scenarios are possible).
SSIINGNGLLEE CABL CABLEE
IINTNTEERFRFAACECE S SCICIFF
SSiinngglle cae cabblle e
Receiver 1
Receiver 1
coconnnnectectiioonn
BBanank 1k 1
LNB
LNB
PoPowweerr
RReecceiveiverer 2 2
or
or
BBanank 2k 2
sspplliittetterr
SWITCH
SWITCH
BBanank Mk M
Receiver N
Receiver N
Fd3Fd3
Bank 1
Bank 1
Fd2Fd2
UIUIFF Bank 2
Bank 2
iinnppuuttss
Fd1Fd1
Bank M
Bank M frequency
frequency
UIUIFF
oouuttppuutt
UB_UB_22
UB_UB_11 UB_UB_33 UB_UB_TT
TT= N= Nbb__uubb

Figure 2 — General system operation and UB slot frequency mapping

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BBanank 1k 1
Power
Power
spsplliitttterer
BBanank 2k 2
Receiver 1
Receiver 1
SSCICIFF
BBanank 3k 3
Receiver 2
Receiver 2
Bank 4
Bank 4
NNuummbbeerr o off bbaannkkss = = N Nbb__BB == 4 4
Number of user slots = Nb_ub = 2
Number of user slots = Nb_ub = 2

Figure 3 — Installation example, system with reception of one orbital position
(4 Satellite IF banks) by two receivers (2 UB slots)
Bank 1
Bank 1
SSaatteellitllitee
AA
Bank 2
Bank 2
RReceieceivverer 11
Power
Power
BBanank 3k 3
splitter
splitter
Receiver 2
Bank 4 Receiver 2
Bank 4
SSCICIFF
BBanank 5k 5
Satellite
Satellite
B Receiver 3
B Receiver 3
BBanank 6k 6
RReceieceivverer 44
BBanank 7k 7
BBanank 8k 8
Number of banks = Nb_B = 8
Number of banks = Nb_B = 8
Number of user slots = Nb_ub = 4
Number of user slots = Nb_ub = 4

Figure 4 — Installation example implementing the reception of two orbital positions
(8 satellite IF banks) by four receivers (4 UB slots)

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BBBBanananank 1k 1k 1k 1
SSSSaaaatttteeeellitllitllitlliteeee
AAAA
BBanank 2k 2
BBanank 2k 2
RRRReceieceieceieceivvvverererer  1111
PPPPowowowoweeeerrrr
BBBBanananank 3k 3k 3k 3
spsplliitttterer
spsplliitttterer
RReceieceivverer 22
RReceieceivverer 22
BBBBanananank 4k 4k 4k 4
SSCICIFF
SSCICIFF
BBBBanananank 5k 5k 5k 5131313
SSaatteellitllitee
SSaatteellitllitee
BB RReceieceivverer 33
BB RReceieceivverer 33
DDD
BBBBanananank 6k 6k 6k 6141414
RRRReceieceieceieceivvvverererer  1114444222
151515
BBBBanananank 7k 7k 7k 7
BBBBanananank 8k 8k 8k 8
161616
NNuummbbeerr o off bbaannkkss = = N Nbb__BB == 8 8
NNuummbbeerr o off bbaannkkss = = N Nbb__BB == 8 8111666
NNuummbbeerr o off uusseerr s slloottss = = N Nbb__ubub = = 4 4111222
NNuummbbeerr o off uusseerr s slloottss = = N Nbb__ubub = = 4 4

Figure 5 — Installation example implementing the reception of four orbital positions
(16 satellite IF banks) for 12 receivers (12 UB slots)
5 SCIF control signals
5.1 DC levels
In a single coaxial cable distribution system, all controls issued by the receivers (demodulators) use
the DiSEqC physical layer.
The single coaxial cable distribution system is not backwards compatible with the former 13/18 V
control associated with a continuous 22 kHz tone. The single coaxial cable distribution system is
also not backwards compatible with the tone burst signalling.
In single coaxial cable distribution systems, the signal-sending receiver generates a high DC level
upon which the SCIF control signals are added. After sending the SCIF control signal, the receiver
returns to an idle mode in which it generates a low DC level onto the single cable distribution
TM

system (see Figure 6). With reference to the DiSEqC Bus Functional Specification, the low and
high DC level shall have the following limits on the signal-sending-receiver side:
 LOW _DC value: 12,5 V to 14 V;
 HIGH_ DC value: 17 V to 19 V.
TM

For uni-directional communication (DiSEqC level 1.0; based on the DiSEqC Bus Functional
Specification), the timing shall have the following limits according to Table 1:

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Table 1 — Timing for unidirectional communication
Time period Minimum Maximum Description
duration duration
[ms] [ms]
T1+T2 22 Rise Time and Setup Time
T2 2  Setup time
T3 54 67,5 13,5 ms per byte
T4 2  Wait time after end of DiSEqC
message (T3)
T4+T5 40 Fall time and Wait Time
T1 up to T5 129,5

Channelchange 70/71 xx xx xx (xx)(54ms-67,5ms)
Low DC
T1 T2 T3 T4 T5

Figure 6 — Signal sent by the receiver for uni-directional communication
In Clause 7, the channel-change commands (70/71 in Figure 6) are described in detail.
After each uni-directional message, SCIF reply or reply timeout, the voltage shall return to
“LOW_DC” before sending another message (see Figure 6).
TM

For bi-directional communication (DiSEqC level 2.0; based on the DiSEqC Bus Functional
Specification), the timing shall have the following limits according to Table 2:

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Table 2 — Timing for bidirectional communication
Time period Minimum Maximum Description
duration duration
[ms] [ms]
T1+T2 22 Rise Time and Setup Time
T2 2
T3 13,5 27 13,5ms per byte
T4 15 25 Return to Low DC after Timeout of
50ms (receiver)
T5 40,5 67,5 13,5ms per byte
T6 2 Wait Time after DiSEqC message
(T5)
T6+T7 40 Wait Time and Fall Time
T1 up to T7 181,5

Config 7A-7E Reply 74 xx xx xx xx
Low DC
T1 T2 T3 T4 T5 T6 T7

NOTE Maximum 4 Data Bytes due to 32 UB slots in reply.
Figure 7 — Signal sent by the receiver for bi-directional communication
In Clause 7, the Config and Reply commands (7A-7E and 74xx… in Figure 7) are described in
TM

detail. The hardware of the communication bus shall be realised according to the DiSEqC Bus
Functional Specification. Some additional care shall be taken to ensure an appropriate impedance
of the installation during the SCIF control signals. In Annex A, some implementation rules are given.
5.2 Method of the data bit signalling
DiSEqC uses base-band timings of 500 µs (+/- 100 µs) for a one-third-bit PWK coded signal on a
TM

nominal 22 kHz (+/- 4 kHz) carrier according to the DiSEqC Bus Functional Specification. Figure 8
shows the 22 kHz time envelop for each bit transmitted, with nominally 22 cycles for a bit “0” and 11
cycles for a bit “1”.

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““0” D0” Data bitata bit ““1” D1” Data bitata bit
0.65Vpp
0.65Vpp
TTypyp.
0.0.5 m5 mss
1 ms
1 ms 0.0.5 m5 mss 1 m1 mss
22 cycles 11 cycles 11 cycles 22 cycles
22 cycles 11 cycles 11 cycles 22 cycles

Figure 8 — Bit signalling according to DiSEqC format
6 Structure and format of the SCD2 messages
6.1 Backwards Compatibility to EN 50494
For compatibility reasons all SCIF devices supporting SCD2 shall also include the corresponding
functionality of EN 50494.
6.2 Non-DiSEqC structure
SCD2 uses DiSEqC physical layer, but non-DiSEqC message structure optimised for single cable
operation.
FRAMING: the framing is reduced to the first four bits (7 to 4) of the first byte. The value is “7h”.
Commands with this framing will be ignored by known DiSEqC slaves.
ADDRESS: as remote tuning systems only have one slave there is no addressing of multiple
devices required, and therefore the DiSEqC address scheme is not used.
COMMAND: the commands are already transmitted in the lower nibble of the first byte (.3 to .0).
The length of the complete message can vary between one byte only and eight bytes.
6.3 Uni-directional operation
Uni-directional operation is used for regular tuning commands such as “70h” and “71h”. Voltage
levels and timings are defined in Figure 6.
6.4 Bi-directional operation
Bi-directional operation may be used for receiver installation purposes. Voltage levels and timings
are defined in Figure 7. To use bi-directional communication, hardware according to DiSEqC level
TM

2.0 in the DiSEqC Bus Functional Specification shall be used. Receivers shall send the request
on the “HIGH_DC” and hold this high DC level until either the reply was received or 50ms after the
request have passed (timeout condition). In case of improper reply, the receiver may send the
request up to five times using the repeat mechanism described in Clause 9.
Support of bidirectional operation is optional for the receiver and mandatory for the SCIF.
7 SCD2 commands
7.1 ODU_Channel_change
7.1.1 Formats
The receiver uses this uni-directional command when tuning to a (new) channel is required. Timing
is described in Figure 6.

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ODU_Channel_change format:
70h Data 1 Data 2 Data 3
Data 1 format:
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
UB [4:0] T [10:8]
Data 2 format:
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
T [7:0]
Data 3 format:
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
“Uncommitted switches” ”Committed switches”

 UB [4:0] bits select the UB slot on which the desired signal is expected (Userband-ID).
 “Uncommitted switches” is extended satellite selection known from DiSEqC 1.1. Lower data
nibble of DiSEqC command “39h” can be mapped in here (“uncommitted switch 1” is Bit 4).
 “Committed switches” is the band (.0), polarity (.1), position (.2) and option (.3) bits known from
DiSEqC 1.0. Lower data nibble of DiSEqC command “38h” can be mapped in here (“band” is
LSB).
 The T[.] word is the tuning word calculated by the receiver as follows:
T = F – 100
IF
where
T is the decimal value of the tuning word T[.]. (see above);
F is the IF frequency in MHz (where the tuner would tune to when connected directly);
IF
100 is the constant value used to compress the T[.] word.
7.1.2 “Special” frequencies
Some frequencies are defined as control modes:
Tuning value “0”: Turn off UB (ODU_PowerOFF).
This command shall be sent to the SCIF before the receiver turns into Standby mode.
Tuning value “1”: Switch on CW tone at the centre of UB.
This command is intended for receivers which support this Technical Specification but are not
capable of receiving DiSEqC based installation replies (see 7.3 up to 7.7). In this case, such a
receiver can use tone detection as described in EN 50494.
Tuning value “2”: Switch on CW tone at the centre of UB plus 20 MHz.
This command is intended for receivers which support this Technical Specification but are not
capable of receiving DiSEqC based installation replies (see 7.3 up to 7.7). In this case, such a
receiver can use tone detection as described in EN 50494. In addition to Tuning value “1”, the UB
slot frequency can be shifted by 20 MHz which excludes the possibility that the receiver had
detected any interferer at the position of the nominal UB slot frequency.

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Tuning value “3”: Switch on all UBs (only for test purposes for example application of a
measurement receiver). This command shall not be used in STB.
This remark is related to backward compatibility to EN 50494. If a receiver which only supports
EN 50494 but not the specifications of this Technical Specification sends “ODU_UBxSignal_On”(as
defined in EN 50494), the SCIF shall only switch on those 8 UB slots with the eight lowest IF
frequencies.
Tuning value “4” to “9”: reserved for future use.
Tuning value ≥ ”10”: regular tuning.
7.2 ODU_Channel_change_PIN
The use of this command is optional for MDU application.
The receiver uses this uni-directional command when tunin
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